Not sure why, but I got water shooting out the center AC vents. I can hear water either dripping or running in there. Also it takes a good ten minutes before the real cold air comes on. It's cool, but not cold. Any ideas?

This bulletin is being revised to add the 2013 model year. The Correction has also been updated to provide better clarification on how to access the grommet. Please discard Corporate Bulletin Number 09-01-38-003B (Section 01 – HVAC).

Condition
Some customers may comment that when they have the A/C on, they feel moisture coming from the center HVAC vent. They may also notice that the front and back floor carpet is wet.

Cause

This condition may be caused by a collapsed A/C drain grommet (example shown above), resulting in a buildup of water in the HVAC module.

Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in SI.
Support the transmission with a suitable transmission jack.

Remove the transmission mount bracket (support) bolts (1).
Slightly lower the transmission. This will allow access to the HVAC drain tube and grommet.

Reach above the transmission on the passenger side for automatics (shown above) or on the drivers side for manuals until you feel the HVAC drain tube and grommet.
Remove the HVAC drain tube grommet. Let any/all of the water drain out completely.

Important: Only apply a small amount of grease. Too much grease will cause another restriction in the drain tube.
Apply a small amount of grease, GM P/N 12345579 (in Canada, use 10953481) around the circumference of the HVAC drain tube and grommet (1).
Important: When installing the HVAC drain tube and grommet, make sure they are properly aligned to allow the HVAC water to drain properly.
Reinstall the same HVAC drain tube grommet. Make sure the drain tube is properly centered in the grommet.
Raise the transmission and reinstall the bracket (support) bolts.
Tighten
Tighten the bolts to 58 Y(43 lb ft).
Lower the vehicle. Let the vehicle run with the A/C on.
Perform a final inspection for the A/C and verify that the system is draining properly.

Got my car back last Friday, gotta say the dealership really came through. I've had the car past the 3 year warranty, but as a token of good will, they went ahead and honored a warranty fix. Hats off to Paul Young Family Chevrolet in Laredo, Tx. And Chevrolet in general for being a great company.